# Prisma ORM Complete Guide
Prisma is a type-safe ORM for Node.js and TypeScript that generates a fully typed database client based on your schema — catching many database-related bugs at compile time instead of runtime.
## Defining a Schema
```prisma
model Student {
id String @id @default(cuid())
name String
email String @unique
courses Enrollment[]
}
model Course {
id String @id @default(cuid())
title String
students Enrollment[]
}
model Enrollment {
id String @id @default(cuid())
student Student @relation(fields: [studentId], references: [id])
studentId String
course Course @relation(fields: [courseId], references: [id])
courseId String
}
```
## Migrations
```bash
npx prisma migrate dev --name add_enrollments
```
This generates SQL migration files and applies them, keeping your database schema in version control alongside your code.
## Type-Safe Queries
```typescript
const student = await prisma.student.findUnique({
where: { email: "aarav@example.com" },
include: { courses: { include: { course: true } } },
});
```
The returned object is fully typed based on the `include` clause — TypeScript knows exactly what fields exist, with autocomplete included.
## Seeding Data
Prisma supports a dedicated seed script (like the one used to populate this blog) run via `npx prisma db seed`, useful for local development and demo data.
## When Prisma Might Not Fit
For extremely complex queries or heavy raw SQL optimization, Prisma's query builder can feel limiting — it does support raw queries as an escape hatch, but reaching for them often is a sign a different tool might fit better.
## Conclusion
Prisma removes a lot of boilerplate around database access while keeping full type safety, making it a strong default choice for TypeScript backend projects.
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Prisma ORM Complete Guide
How Prisma simplifies working with databases in Node.js and TypeScript — schema definition, migrations, and type-safe queries.
31 Jul 2026
6 min read
